Harvard's Robot Arm Traps Delicate Sea Animals Without Harm

As you might imagine, you cant't just grab extra-soft sea creature like jellyfish or octopuses when you want to study them. Not if you want them to remain intact, anyway. Thankfully, researchers at Harvard's Wyss institute have a far more delicate solution. They have created a robot arm (the RAD sampler) whose petal- like fingers can quickly form a ball shape around an animal, caputuring it without risking any harm. It's simpler than it look. It uses just a single motor to drive the entire jointed structure, so it's easy to control and easier still to repair if something breaks.

To date, the arm has only been useful for catch and release experiments. In the future, though, biologists could outfit the machine with cameras and sensors to collect information about whatever's inside the sphere, whether it's the material composition, size or the genetic sequencing. If that happens, researchers could study fragile undersea critters in their native habitats and glean insights that wouldn't be available above water or with dead specimens.

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